   body {
            margin: 0;
            padding: 0;
            font-family: '微软雅黑';
        }
        
        ul {
            margin: 0;
            padding: 0;
        }
        
        li {
            list-style-type: none;
        }
        
        .top{width: 100%;height: 50px;position:relative;float: left; background-color: #F7F6F4;color:#4E4D4B; text-align: center; line-height: 50px;} 
        .top .top_left{ position: absolute; width: 12px; top: 17px; left: 15px;} 
        .top .top_left img{width: 100%; float: left;}
        